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1 | /* |
2 | * arch/arm/include/asm/hugetlb-3level.h | |
3 | * | |
4 | * Copyright (C) 2012 ARM Ltd. | |
5 | * | |
6 | * Based on arch/x86/include/asm/hugetlb.h. | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License version 2 as | |
10 | * published by the Free Software Foundation. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
20 | */ | |
21 | ||
22 | #ifndef _ASM_ARM_HUGETLB_3LEVEL_H | |
23 | #define _ASM_ARM_HUGETLB_3LEVEL_H | |
24 | ||
25 | ||
26 | /* | |
27 | * If our huge pte is non-zero then mark the valid bit. | |
28 | * This allows pte_present(huge_ptep_get(ptep)) to return true for non-zero | |
29 | * ptes. | |
30 | * (The valid bit is automatically cleared by set_pte_at for PROT_NONE ptes). | |
31 | */ | |
32 | static inline pte_t huge_ptep_get(pte_t *ptep) | |
33 | { | |
34 | pte_t retval = *ptep; | |
35 | if (pte_val(retval)) | |
36 | pte_val(retval) |= L_PTE_VALID; | |
37 | return retval; | |
38 | } | |
39 | ||
40 | static inline void set_huge_pte_at(struct mm_struct *mm, unsigned long addr, | |
41 | pte_t *ptep, pte_t pte) | |
42 | { | |
43 | set_pte_at(mm, addr, ptep, pte); | |
44 | } | |
45 | ||
46 | static inline void huge_ptep_clear_flush(struct vm_area_struct *vma, | |
47 | unsigned long addr, pte_t *ptep) | |
48 | { | |
49 | ptep_clear_flush(vma, addr, ptep); | |
50 | } | |
51 | ||
52 | static inline void huge_ptep_set_wrprotect(struct mm_struct *mm, | |
53 | unsigned long addr, pte_t *ptep) | |
54 | { | |
55 | ptep_set_wrprotect(mm, addr, ptep); | |
56 | } | |
57 | ||
58 | static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm, | |
59 | unsigned long addr, pte_t *ptep) | |
60 | { | |
61 | return ptep_get_and_clear(mm, addr, ptep); | |
62 | } | |
63 | ||
64 | static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma, | |
65 | unsigned long addr, pte_t *ptep, | |
66 | pte_t pte, int dirty) | |
67 | { | |
68 | return ptep_set_access_flags(vma, addr, ptep, pte, dirty); | |
69 | } | |
70 | ||
71 | #endif /* _ASM_ARM_HUGETLB_3LEVEL_H */ |